122 



REPORTS ON INVESTIGATIONS AND PROJECTS. 



matic factors to be dealt with. In addition to the above, Dr. G. E. Hale, 

 director of the Solar Observatory on Mount Wilson, near Pasadena, in 

 southern California, has placed at the disposal of the Desert Laboratory facil- 

 ities by which a plantation may be established on the summit, at an elevation 

 of 5,500 feet, in a climate quite different from that offered by any of the 

 above localities. A comparative culture has also been established at the trop- 

 ical station at Cinchona, Jamaica, in which a few species are under observa- 

 tion. The completion of the plan entails the establishment of a culture at 

 11,000-12,000 feet in the San Francisco Mountains, in northern Arizona. 



As an illustration of the method of experimentation the following plants 

 have been taken from the desert locality of the Desert Laboratory at 2.300 

 feet, to the austral plantation on Castle Rock, at an elevation of 6,000 feet. 



Sphcrralcca pcdata, roots and seeds, peren- 

 nial. 



Jasmine gracilis, stocks, perennial. 



Kramcria canesccns, stocks, perennial. 



Bigclovia hartzvegii, clumps, perennial. 



Mcnodora scabra, stocks, perennial. 



Hilaria mutica, roots and seeds, peren- 

 nial. 



Cassia covcsii, stocks, perennial. 



Encclia farinosa, stocks and seeds, peren- 

 nial. 



Verbena ciliata, stocks and seeds, peren- 

 nial. 

 Covillea tridentata, seeds, perennial. 

 Franscria deltoidea, seeds, perennial. 

 Plantago aristata, seeds, annual. 

 Plantago fastigiaia, seeds, annual. 

 LcsqucrcUa gordonii, seeds, annual. 

 Daucus pusillus, seeds, annual. 

 HarpagoncJla pahiieri, seeds, annual. 

 Xanthium canadcnse, seeds, annual. 



The following species from near sea-level, in a moist climate, were placed 

 in a culture in the alpine station on the Santa Catalina Mountains, at an ele- 

 vation of 8,000 feet: 



Phytolacca decandra, roots, perennial. 

 Polygonatum biflorum, rhizomes, peren- 

 nial. 

 Antcnnaria biAorum, rhizomes, perennial. 

 Antennaria neglecta, rhizomes, perennial. 

 Aquilegia canadensis, rhizomes, perennial. 

 Bicitculla cucullata, bulbs, perennial. 

 Selaginella rupestris, rhizomes, perennial. 

 Hepatica hepaiica, roots, perennial. 

 Ariscema triphyllum, corms, perennial. 



Sequoia gigantea, seeds, perennial, from 



California. 

 Roripa aincricana, roots, perennial, Lake 



Champlain. 

 Quercus, a dwarf species from the Sierra 



de Pachuca, Mexico. 

 Sanguisorba canadensis, roots, perennial. 

 Gcnm canadensis, roots, perennial. 

 Aletris farinosa, roots, perennial. 

 Lilinm siipcrbuni, bulbs, perennial. 

 Trillium undulatum, rhizomes, perennial. 



Roripa auiericaiia, the American water-cress, which Dr. MacDougal 

 secured from its habitat in Lake Champlain in 3 feet of water, in 1902, was 

 transferred to ordinary soil cultures in 1902, in w^iich it has since grown, 

 having undergone the most sweeping changes in structure and habit, some 

 cultures of this plant being carried on at Cinchona, Jamaica, in a tropical 

 climate, and, as noted above, it has been placed in three of the plantations 

 in connection with the Desert Laboratory. Several years must elapse in the 



